Posted on May 6, 2020 at 11:04 pm
If you are using certbot (Let’s Encrypt) with Nginx on Debian Buster you may have encountered problems in auto-renewal of your certificates. This may be because the /etc/cron.d/certbot didn’t actually execute, ore information can be read here:
https://community.letsencrypt.org/t/cerbot-cron-job/23895/5
It looks like that if the directory /run/systemd/system/ exists it won’t execute the renew command, because you are running systemd. It won’t run the renew command because there is a systemd timer that was configured when you installed the certbot package.
The certbot timer should be located on /lib/systemd/system/certbot.timer and it will execute the command specified on /lib/systemd/system/certbot.service file. The certbot.timer will execute the certbot.service twice daily, precisely at 12 am and 12 pm.
This is the content of /lib/systemd/system/certbot.timer:
[Unit] Description=Run certbot twice daily [Timer] OnCalendar=*-*-* 00,12:00:00 RandomizedDelaySec=43200 Persistent=true [Install] WantedBy=timers.target |
And this is the content of /lib/systemd/system/certbot.service:
[Unit] Description=Certbot Documentation=file:///usr/share/doc/python-certbot-doc/html/index.html Documentation=https://letsencrypt.readthedocs.io/en/latest/ [Service] Type=oneshot ExecStart=/usr/bin/certbot -q renew PrivateTmp=true |
Instead, you should use this script (works better):
Automatically Renew Let’s Encrypt Certificates (Nginx)
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